Brake drum



Jan. 2, y1940.

A. S. VAN HALTEREN BRAKE DRUM Original Filed July 25, 19554 ATTORNEY.

Patented Jan. 2, `1940 Y I y UNITED STATESv is i v I i .2,185,875 y l l BRAKE DRUM v y n Andrew Van Halteren, Lansing, Mich., assignor to MotorjWheel Corporation,` Lansing, Mich., a corporation of- Michigan,

Original application July 25, '1935, Serial No.

` 33,081, now Patent No.'2,1121,697, dated March 29, 1938. Divided and this application November 18, 1937, .Serial No. 175,212 l 4 claims. (ci. 18s-21s) This invention relates to brake drums. y Speci- The cylinder Il is next submitted to conven- Ilcally, the invention relates to brake drums corntional rolling operations whereby the two external prising a steel shell having an inner liner fused ribs I3 are'formed intermediate the edges of the thereto and extending part way only into a shell (see Figure 3). The ribs i3 are quite close hollow external rib at one edge of the shell Where- 'to each other and extend completely around the 5 by the outer portion of the rib may be flanged to shell `I I. l form a seal. Y The cylinder ll is next operated upon to pro- The brake drum herein disclosed is preferably videthe inturned anges It at its opposite edges.' made by the process described in my prior co- This operation may be performed by any convenpending application Serial No 33,081, filed July tional method. The flanges serve as side boards 10 25, 1935, of which this application is a division. to retain the molten cast-iron which is subse- It will be understood, however, that itmay be quentlyintroduced into the shell'and also made by other methods. attaching llanges in the finished brake drum.

1 The principal object of the invention is the pro- It is desired to prevent the molten' cast iron wear resisting characteristics of the cast lined hereto-fore in order to minimize the quantity ofdrums now in use but which is lighter, more ecoiro-n required and also to permit the bending of nomical to produce, and which may be deformed the ribs to form seal ilanges. To this end, the to provide an integral axially extending sealing cylinder is next treated as illustrated in Figure 5 90 ilange at the open edge of the drum. The manner to close the outer portion of the ribs. As there 20L ofattaining these and other objects will be appar- Shown the cylinderis mounted on a platform I5 ent upon reading the following description in conwith an annular spacer I6 between the ribs i3. A nection with the accompanyingdrawing, wherein: movable die I1 is arranged to press against the Figure l illustrates a flat strip of steel used in outer wall of the adjacent rib i3. The platform forming the shell for two drums; I5 is hollow to receive the cylindrical portion of 25 Figure 2 shows the strip of Figure 1 coiled to the shell lI. The die il is likewise hollow for a cylindrical form; similar purpose. The spacer i6 is preferably Figure 3 shows the cylinder after the Aformation made up 0f PWO'OI more Sections Which are inof a pair of external ribs intermediate its edges; serted between the ribs I3 before the shell lI is p Figure 4 shows the cylinder after its edges have mounted on platform `I 5. The radially Outer 51.1.? 430 been turned inwardly to provide attaching face of spacer I6 is inclined to contact the inclined anges; side wall i8 of platform I5 whereby the metal Figure 5 illustrates the manner in which the between ribs I3 is pressed inwardly during the side walls of the external ribs are pressed toclosing of the ribs. Platform I5 is stationary and gether; die I1 is reciprocated vertically in and out of 35 Figure 6 shows the cylinder after the operation Contat With the Shell H by any Conventional illustrated in Figure 5; means. Figure 7 shows the cylinder after the cast liner As shown in Figure 6, the Opelin just de-l has been fused thereto and indicates by dotted scribed closes the radially Olltel POIOH 0f each lines'where the shell and liner are cut to produce of the ribs I3 but leaves a hollow DOIOD Ol 2m- 40 a pair of cast lined rings; nular groove at the base of the rib. Consequently Figure 8 shows the cast lined ring attached to when the cast iron liner is applied tothe shell by a brake drum web, and assembled with its asso- IOtating the Same While pouring molten iron into ciated parts, the latter being shown in dotted it, the molten iron flows into the base only ofthe vision of a drum which has all of the strength and from filling the ribs E3 as has been the practice 15 lines; and ribs I3. Figure 7 shows the shell after the cast 45`v4 Figure 9 Shows the Cast lined ring and web 3,5- I'OIl has been lltI'OdllCed aS vjllS described. The gambled with a modified form 0f backing plate cast liner is indicated at i9. During the intro- (dotted lines) with the radial rib of the ring shell duction and solidifying of the cast iron the flanges bent to form an axially extending seal flange, I4 serve to hold the molten metal in the rotating In forming the present invention-a strip of sheet Shell. The method Of attaching a cast linerl in 50 steel Il), as shown in Figure l, is selected of the this manner is now in use and is well known. desired length and width. It is then coiled as v After the Cast iIOn liner I9 has been fused to indicated in Figure 2 to provide a cylindrical shell the shell I I and has solidied, an annular section I I. The ends of the strip are welded together of the shell and liner located between the ribs I3 as indicated at I2 in Figure 2. is removed'by cutting the same along dotted lines 55 2D (Figure '7). n this manner two identical cast lined brake rings are produced, each having an attaching flange I4 at one edge and an external rib I3 at the other edge. To prepare the ring thus formed they are next machined to proper size as vshown by the, dotted lines. 2 I` ini Figure" '7. They may also be sized by aiconventionall sizing operation, if desired.

After the machining and sizing operations the` l cast lined rings are ready for assembly4 in. a.k

brake drum. As shown in Figure 8 the cast'lined ring is attached to a brake drum Web2.2 by., rivets 23. in dotted lines. dotted lines, is mounted adjacentthe open side,- of the drum in the usuallmanner. plate 25 is here shown ashavinga peripheral.` flange 26 cooperating with rib I3 to effect` a?. sea-1 for the brake drum to prevent the entrance of foreign matter into the drum. n

Figure 9 illustrates a-modifled arrangement of the drum assembly. In-this instance,- the rings also attached to a Web 22, but the radial outer portion of the rib- I 3 is bent axially: to form. a seal flange 2'I. This is made possible only, by reason of the fact that the cast liner doesfnot extend into this outer portion ofthe-rib. In this form of arrangement the backingy plate 25 is preferably provided Withseal rings 28 and;29 in addition to the peripheral flange 26; Inl this manner a more effectivev seal is formed.

From the foregoing description it- Will-befapparent that this inventiony provides an improved form of cast lined brake drum. Obviouslyv the The web is mountedl upon av hub: 24 shown@ A backing plate 25, also shown in.

The: backing;

form of the drum may be varied within Wide limits Without departure from the spirit or scope of the invention as dened by the appended claims.

I claim:

l. A brake drum comprising a cylindrical shell having: an: external rib'4 hollow" at" itss' base and closed at its-radially outer'extremityand: a metal liner secured to the inner surface of the shell and extending into the base of the rib, the radially outer. extremity of the rib being flanged to form an axially extending sealing element.

2:4 Al brake ,drum comprising a steel shell having anexternal ribat. one edge thereof, and a cast metali liner* fused: to the inner surface of the shell. and the baseof the rib, the radially outer portion, of the ribv being flanged to form an axially.. extending seal.

SLAQ brake drum, comprising a cylindrical steel shell having an external annular rib at one edge thereof; said rib being of double thickness with the Wallsl thereof pressed together, and a cast metal liner fused to the inner surfacefof the shell and thctbase only ofA said ribthe radially outer portion of. said rib being bentaxially to form. an axially extending sealing flange.

4. A brake drum comprising a cylindrical,v steel shell having an external annular rib pressed outwardlyA therefrom With the Walls of saidY rib pressedtogether, and acast metal linerl fused to theinner surface of. theI shell and the base only of said ribthe radially outer portion of said rib being bent axiallytoforman axially extending sealing flange.

ANDREWI S. VAN-HALTEREN. 

